Battery charger



FIG. 1 is a top front perspective view of a battery charger showing the claimed design;

FIG. 2 is a front view thereof;

FIG. 3 is a rear view thereof;

FIG. 4 is a left side view thereof;

FIG. 5 is a right side view thereof;

FIG. 6 is a top view thereof;

FIG. 7 is a bottom view thereof; and,

FIG. 8 is a top front perspective view thereof in an environment in which it may be used.

The broken lines in the figures show portions of the battery charger and environment that form no part of the claimed design. 

CLAIM The ornamental design for a battery charger, as shown and described. 